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								<div id="siteSub">From PanoTools.org Wiki</div>
								
												
				<div id="mw-content-text" lang="en" dir="ltr" class="mw-content-ltr"><p>The
Portable Network Graphics Image format<a class="external" href="http://wiki.panotools.org/Image_format">[*]</a>
is a common and free format used to store and exchange digital bitmapped images of all kinds. For general information see the PNG Wikipedia page<a class="external" href="http://www.wikipedia.org/wiki/PNG">[*]</a>
</p><p>PNG was originally created because of shortcomings and patent issues with widely used <a href="GIF.html" title="GIF">GIF</a> format. It uses lossless compression and supports different bit depth and <a href="Alpha_channel.html" title="Alpha channel">alpha channel</a> transparency. It often compresses better than the different <a href="TIFF.html" title="TIFF">TIFF</a> compressions. However, it is not very well supported by Photoshop<a class="external" href="http://wiki.panotools.org/Photoshop">[*]</a> (you need a format plugin to support all flavors: <a rel="nofollow" class="external autonumber" href="http://www.fnordware.com/superpng/">[1]</a>)
</p><p>Only recently PNG support of the Panorama tools core library <a href="Pano12.html" title="Pano12">pano12</a> was fixed.
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